Machine for making screw-wire for pegs



(No Model.)

s. w ROBINSON.

MACHINE FOR MAKING SCREW WIRE FOR PEGS. $10,325,275.

Patented Sept. 1, 1885.

J J a a m k z m V INN- 2L a z I 1 a .Z J z 4 a 2 4 J an L I; .m 7 2 H F g M T Z. "15W, J w W 7,

I v r W'Ih NITED STATES PATENT OFFICEO STILLMAN W. ROBINSON, OF COLUMBUS, OHIO.

MACHINE FOR MAKING SCREW-WIRE FOR PEGS.

SPECIFICATION forming part of Letters Patent No. 325,275, dated September 1, 1885.

(No model.)

To all whom it may concern:

Be it known that I, STILLMAN W. ROBIN- soN, of Columbus, county of Franklin, State of Ohio, have invented an Improvement in Machines for Nicking and Threading ire, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

So far as my knowledge extends, in all ma chines heretofore constructed for screw-threading wire the wire to be threaded has been supported by feed-rolls, and in some instances by gripping-rolls in connection with the feedrolls located only in front of the thread-cutting mechanism, and the wire has remained unsupported between the screwthreading and winding reel or bobbins. Such threading-ma chines often impart a permanent twist to the wire, and no means being provided back of the cutter to bind or clamp the wire and prevent such torsional twist, or to remove it by giving a counter-torsional twist to the wire to neutralize the first twist given thereto the said wire leaves the machine or is coiled on the bobbin permanently twisted. This permanent twist is found to be very objectionable when the wire is being uncoiled and used in certain machines for uniting the soles and uppers of boots and shoes.

In some wire-cutting machines of the class referred to the wire, after leaving the threadcutting mechanism, passes through the bore of a comparatively long spindle or rotating hollow shaft which carries the thread-cutter, and which prevents the possibility of binding or clamping the threaded wires sufficiently near to the thread-cutter to overcome the objeetionable permanent twist of the threaded wire.

My invention has for its object to overcome this objection and to provide a machine in which the wire to be threaded is clamped or gripped immediately in front and in the rear of the die-carrier and die as it is fed through said die and threaded. I accomplish this result by supporting the die-carrier on a comparatively thin rotating pulley or disk,which I provide at its center with any suitable diecarrier and thread-cutting die or dies, and immediately in front of such rotating pulley I arrange feed-rolls, and at the rear of the said pulley I arrange a second pair of rolls, denominated pressurerolls, which, if desired, may also serve as drawing or pulling rolls, the latter rolls being placed as close to the said pulley as the desired thinness of the pulley enabling the said pairs of rolls to be brought so close to the dies as to prevent permanent twist of the wire. The speed of rotation of the feed-rolls and of the pulley and dies is such with relation the one to the other as to impart the desired pitch to the notches or threads out upon the wire, and the feedrolls are provided with mechanism to enable the wire placed between them to be gripped with greater or less pressure, as desired.

The invention is fully disclosed in the following specification, and is particularly pointed out in the claims.

Figure 1 shows in side elevation, partly in section, a machine for nicking or threading wire embodying my invention. Fig. 2 is a plan thereof; Fig. 3, a sectional view of a piece of flattened nicked or threaded wire of a form shown and described in Letters Patent No. 265,149, granted to me September 26, 1882, that being the class of wire which my machine is especially adapted to prepare. Fig. 4 are details, in end view and section, of the die-carrier and dies employed in my improvedscrew-thread-cutting mechanism. Fig. 5 shows one of the dies in plan and in end View.

The bed-plate A of the machine has erected upon it three standards, B, L, and N, the standard L, carrying the feed-rolls E, being firmly attached to the bed-plate, while the standard B, supporting the pulley or disk 0 and die-carrier G, and the standard N, having the press-rolls F, are provided with slotted feet 2, through which pass screws h g, which enter the bed-plate and adjustably hold the standards, so as to permit their longitudinal movement on the said bed-plate, and thereby enable the feed and press rolls to be adjusted with relation to the die-carrier and dies to give access to the diecarrier to adjust or remove the die.

To enable the feed-rolls E and press-rollsF to be placed in close proximity to the diecarrier 0, the latter is mounted in a thin pulley or disk, 0 having an annular groove in one of its sides to receive an annular flanged projection, 4, on the standard B, which projection serves as a bearing for the pulley which receives in its groove the ring X, which is secured therein over the flange of the proj ustable toward and from each other by the screws 8, which act against the outer end of the dies. These dies nick or thread the wire as it is passed through between them. The forms of wire to be cut include all those shown in the patent referred to.

Some of the forms would require that one or both of the feed and press rolls be suitably grooved; but the flattened wire (shown in Fig. 3 of the drawings) is especially adapted for being fed and clamped by the cylindrical rolls shown, and it is the form that will be understood as being referred to in this description.

The feed rolls E are mounted upon shafts a b,having bearings one above the other in the arms of the standard L, and provided within termeshing gears G to give motion in unison to the feed-rolls E. The lower shaft has a worm-wheel, H, engaging the worm I on the shaft 5, bearing in the standard L and having a belt-pulley, J, to receive a belt from a suitable shaft to cause the feed-rolls to be speeded relatively wit-h the die-pulley C The upper shaft, a, has its bearings in the movable arm K, fulcrumed at t and provided with-a screw, 7c, passing down into the rigid arm to permit lheupper feed-roll E to be adjusted with relation to the lower one, and thereby regulate the pressure thereof on the wire passing between said feed-rolls.

The press-rolls F are mounted on shafts 0d,

. the shaft 0 having bearings in the lower rigid arm of the standard N, and the shaft (1 being secured in the movable arm M of the said standard, the said movable arm, being fulcrumed'at J and having a screw, Z, to permit adjustment of the press-rolls F.

If desired, the press-rolls could also serve as feed ordriviug rolls in connection with the rolls E by providing them with gearing similar to those provided for the rolls E, and further extending the shaft 5 and placing thereon a second worm,like the worm I. The primary object, however, of the press-rolls F is to prevent the flattened wire (shown in Fig. 3) from being permanently twisted by .the torsional. strain due to the cutting action of the die D.

As the threads or nicks in the wire are required to be rather coarse, the rotating cut ting action of the die tends all the more to strain and give to the cut wirea permanent twist. WVith the feed-rollsE only, or with clamping mechanism in front of the pulley and die-carrier only, this torsional action of the die must be resisted by the torsional strength of the wire between the die and such feed-rolls or clamping means in front of the die; but by adding the press-rolls F to clamp or hold the wire immediately in rear of the die, the torsional strength of the wire between the die and such pressrolls is added to resist the torsional action of the said die. This double strength or increased resistance to the injurious action of the die is sufficient usually to prevent a serious permanent twist being imparted to the cut wire, while otherwise it is likely to leave the machine badly twisted.

But the pressrolls F have a further function. Should the die become so worn and dull as to seriously twist the wire on both sides of the die inspite of both feed and press rolls, it is to be observed that the wire between the said die and the press-rolls will be twisted in a direction opposite to that between the die and feed-rolls. Then by a proper adjustment of the distance between the die and press'rolls the counter twist may be made just sufficient to straighten the direct twist, and thus enable the wire to leave the machine true.

The press-rolls F are made large, so as to act better and afiford more peripheral or en gaging surfaces to engage the fiat surfaces of the wire. A guide-piece, O is secured to the standard L in front of the feed-rolls, and is providedwith awirereceiving orifice arranged in the path of the wire through the machine to properly guide the wire to the feed-rolls.

I claim- 1. In a machine for nieking or threading wire, the combination, with arotating die-carrier provided with nicking-die, of a pair of feed-rolls arranged in front of the die-carrier and a pairof press-rolls located in rear of the said die-carrier, to operate substantially as described.

IOC

2. The combination, substantially as described, with a pair of feed-rolls, and a pair of press-rolls, of a pulley, 0 provided with a rotating die-carrier arranged intermediate of the feed and press rolls and having a die, D, the said pulley and die-carrier being made thin or constructed to occupy but little space in the direction of the path of the wire to thereby permit the feed and press rolls to be placed in close proximity therewith, for the purpose specified. e

3. The combination, with the standard provided with the flanged annulus, as described, of the pulley 0 having an annular groove in one of its sides and provided with a ring, X

substantially as and for the purpose set forth.

4. The combination, with a fixed standard provided with a pair of feed-rolls, and a standard made longitudinally movable and having a rotating die-carrier and a die, of a second movable standard adapted to have a longitudinal movement in rear of the said die carrier,

and provided with a pair of press-rol1s,subing down through it and entering the rigid 1o stantially as and for the purpose specified. armof the standard, for the purpose set forth. 5. In a machine for screw-threading wire, In testimony whereof Ihave signed my name a standard having a rigid arm provided with I to this specification in the presence of two suba roll-shaft, combined with a movable arm scribing witnesses. having a rigid portion projecting at right an- STILLMAN W. ROBINSON. gles thereto and fulcruined to the said stand- XVitnesses:

ard and provided with a roll-shaft, the said G. \V. GREGORY, movable arni having an adjusting-screw pass- H. P. DEVOL. 

